Tugs tow units of an artificial harbor and push phoenix units into position constructed by the Seabees in Normandy, France.

Creation of an artificial harbor and bridges by the Seabees in Normandy, France during World War II. Tugs with units of the artificial harbor in tow. A barrage balloon overhead. The tugs push phoenix units into position. Crew on the phoenix units works with lines. Flooded phoenix compartments. The phoenix units sunk in position. A Phoenix unit in sea and crew men on the unit.